Here is a review of why this works and how to make it more "interesting" for your readers:
Why: Specificity drives clicks. People love a shortcut to the "best" parts. Subject: 37 ways to solve [Problem X] once and for all. We found 37 resources for you..
If you want to move beyond a standard newsletter vibe, try these tweaks to the subject line or the opening: Here is a review of why this works